Tourism development corporation in Uttar Pradesh was

What is the value of cos [(180 – θ)/2] cos [(180 – 9θ)/2] + sin [(180 – 3θ)/2] sin [(180 – 13θ)/2]?

If  x - √(3y) =19 Then find the slope in angle?

If cos(90° − θ) = 3/5 for an acute angle θ, find:

If cos2B = sin(1.5B + 27 ^o), then find the measure of 'B'. 

A 16-meter-long rope is stretched from the ground to the top of a house, forming a 30° angle with the ground. Determine the height of the house.

If 5sin²x + 3cos²x − 4 = 0, then find the value of sinx, given that 0° < x < 90°.

If cos⁴ p - sin⁴ p =

If A lies in the first quadrant and 6 tan A = 5, then the value of 8 sin A−4 cos A / cos A+2 sin A is :

What is the value of sin(B – C) cos(A – D) + sin(A – B) cos(C – D) + sin(C – A) cos(B – D)?